Thickness detection device of conveying belt

Abstract

The invention discloses a thickness detection device for a conveying belt, and the device comprises a first distance measurement sensor which is opposite to the outer surface of the conveying belt and is used for measuring the distance h1 from the first distance measurement sensor to the outer surface of the conveying belt; the second distance measuring sensor is opposite to the inner surface of the conveying belt and used for measuring the distance h2 from the second distance measuring sensor to the inner surface of the conveying belt, and the first distance measuring sensor and the second distance measuring sensor are arranged on the two sides of the conveying belt; the data processing device is connected with the first distance measuring sensor and the second distance measuring sensor through a synchronous triggering device, and the thickness value ph of the conveying belt is calculated according to the distance H between the first distance measuring sensor and the second distance measuring sensor and the formula ph = H-h1-h2. By arranging the first distance measuring sensor and the second distance measuring sensor, the distance to the conveying belt is automatically detected, the thickness of the conveying belt is calculated through the data processing device, manual operation is not needed, and the result accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of conveyor belt detection, and in particular to a conveyor belt thickness detection device. Background Art

[0002] Belt conveyors are important transportation equipment for transporting materials in many fields such as ports, metallurgy, mining, chemicals, petroleum, power plants, building materials, etc. In particular, long-distance, high-power, large-volume, and high-speed conveyors have become the development trend of belt conveyors.

[0003] During the operation of the equipment, the belt runs for a long time in a complex environment with high loads. During the belt conveying process, the material will slide on the belt, causing some wear on the belt. As the degree of wear deepens, when the belt thickness decreases to a certain value, it will affect the safe operation of the belt. For example, in underground transportation of coal mines, metallurgical materials, and materials in the chemical industry, a whole-core flame-retardant conveyor belt is usually used. When the outer flame-retardant layer of the whole-core flame-retardant conveyor belt is worn off, once the temperature of the transported material is abnormal, it is easy to cause a fire safety accident.

[0004] At present, there are two types of flame-retardant belts: PVC flame-retardant belts and PVG flame-retardant belts, and the flame-retardant layers of these two types of flame-retardant belts are not thick. Among them, the PVC flame-retardant belt is covered with a layer of PVC cover rubber on the upper and lower surfaces of the belt, and the thickness of the PVC cover rubber is ≥0.8mm. The covering layer on the upper and lower surfaces of the PVG flame-retardant belt is a combination of nitrile rubber and PVC, with a single layer thickness of 1.5mm-4.5mm, and the conveyor belt has a certain angle, which makes the center of the PVG flame-retardant belt more severely worn than the edge area.

[0005] In summary, in order to reduce the occurrence of failures, it is necessary to formulate a belt replacement cycle based on production experience, and to manually check the thickness regularly using a steel ruler or caliper.

[0006] However, the manual measurement of belt thickness may lead to inaccurate measurement results due to the influence of the measurement position. For belts with flame retardant layers on both the upper and lower surfaces, it is impossible to obtain the thickness change of the flame retardant layer on one side, which in turn affects the accuracy of the belt measurement results.

[0007] Therefore, how to improve the accuracy of belt thickness measurement is a technical problem that technical personnel need to solve urgently. Summary of the invention

[0008] In view of this, the present invention provides a thickness detection device for a conveyor belt to improve the accuracy of belt thickness measurement.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A conveyor belt thickness detection device, comprising:

[0011] a first distance measuring sensor, the first distance measuring sensor being opposite to the outer surface of the conveyor belt and being used to measure a distance h1 from the first distance measuring sensor to the outer surface of the conveyor belt;

[0012] a second distance measuring sensor, the second distance measuring sensor being opposite to the inner surface of the conveyor belt and being used to measure a distance h2 from the second distance measuring sensor to the inner surface of the conveyor belt, the first distance measuring sensor and the second distance measuring sensor being arranged on both sides of the conveyor belt;

[0013] A data processing device, wherein the data processing device is connected to the first ranging sensor and the second ranging sensor via a synchronous trigger device, wherein the synchronous trigger device is used for the data processing device to synchronously collect the distances detected by the first ranging sensor and the second ranging sensor respectively, and calculate the thickness value p_h of the conveyor belt according to the distance H between the first ranging sensor and the second ranging sensor in combination with a conveyor belt thickness calculation formula p_h=H-h1-h2, and store the calculated value.

[0014] Preferably, in the above-mentioned conveyor belt thickness detection device, a line connecting the first distance measuring sensor and the second distance measuring sensor is parallel to a thickness direction of the conveyor belt.

[0015] Preferably, in the above-mentioned conveyor belt thickness detection device, the data processing device uniformly collects data values ​​of multiple groups of the first ranging sensors and the second ranging sensors along the length direction of the conveyor belt, and obtains the distances from the multiple first ranging sensors to the outer surface of the conveyor belt.

[0016]

[0017] and the distance from the second distance measuring sensors of the same number to the outer surface of the conveyor belt:

[0018]

[0019] According to the conveyor belt thickness calculation formula, a set of conveyor belt thickness values ​​are calculated:

[0020]

[0021] The calculated thickness of the conveyor belt is used for fitting to obtain the calculated value of the conveyor belt thickness P_H final , the calculated value of the conveyor belt thickness P_H final Then it is the conveyor belt thickness value p_h.

[0022] Preferably, in the above-mentioned conveyor belt thickness detection device, the data processing device is integrated with a time relay, and the data processing device collects a set of data values ​​of the first distance measuring sensor and the second distance measuring sensor at every preset time t, and stores them;

[0023] The preset time t satisfies: n=T / t, wherein n is the number of sampling points and T is the time for the conveyor belt to run one cycle.

[0024] Preferably, in the above-mentioned conveyor belt thickness detection device, the calculated conveyor belt thickness value is used for fitting to obtain the calculated value P_H of the conveyor belt thickness. final ,include:

[0025] The calculated thickness of the conveyor belt is fitted by linear regression to obtain the linear equation y=ax+b.

[0026] If a=0, then P_H final =b,

[0027] If a≠0, then P_H final =(ax max +ax min +2b) / 2,

[0028] Among them, a and b are constants, x max is the largest value among the multiple sets of calculated conveyor belt thickness values, x max It is the smallest value among the multiple sets of calculated conveyor belt thickness values ​​collected.

[0029] Preferably, in the above-mentioned conveyor belt thickness detection device, the first distance measuring sensor and the second distance measuring sensor both correspond to the center position of the conveyor belt in the width direction.

[0030] Preferably, the above-mentioned conveyor belt thickness detection device further includes an alarm device, and if the thickness value p_h of the conveyor belt is less than a preset value, the alarm device issues a safety alarm.

[0031] Preferably, in the above-mentioned conveyor belt thickness detection device, the data processing device pre-stores the preset value, and the data processing device is integrated with a control module, and the control module controls the alarm device to issue a safety alarm.

[0032] Preferably, in the above-mentioned conveyor belt thickness detection device, the data processing device also pre-stores a first agreed value from the first distance measuring sensor to the outer surface of the conveyor belt.

[0033] When the distance h1 from the first distance measuring sensor to the outer surface of the conveyor belt measured by the first distance measuring sensor is greater than the first agreed value, the alarm device issues a safety alarm.

[0034] Preferably, in the above-mentioned conveyor belt thickness detection device, the data processing device also pre-stores a second agreed value from the second distance measuring sensor to the inner surface of the conveyor belt.

[0035] When the distance h2 from the second distance measuring sensor to the inner surface of the conveyor belt measured by the second distance measuring sensor is less than the second agreed value, the alarm device issues an alarm indicating that the conveyor belt is not tensioned.

[0036] The present invention provides a device for detecting the thickness of a conveyor belt. A first distance measuring sensor and a second distance measuring sensor are provided to automatically detect the distance of the conveyor belt, and the thickness of the conveyor belt is calculated by a data processing device under the action of a synchronous trigger device. No manual operation is required, which is conducive to improving the accuracy of the result. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a structural schematic diagram of the conveyor belt thickness detection device disclosed in the embodiment of the present application when it is applied to a conveyor belt conveying device;

[0039] Figure 2 It is a structural schematic diagram of a conveyor belt thickness detection device disclosed in an embodiment of the present application;

[0040] Figure 3 The time of collecting the thickness of the conveyor belt and the distribution diagram of the thickness of the conveyor belt disclosed in the embodiments of the present application;

[0041] 1 is the pulley, 2 is the conveyor belt, 3 is the support wheel, and 4 is the silo;

[0042] 5 is a data processing device, 6 is a synchronous trigger device, 7 is a first distance measuring sensor, and 8 is a second distance measuring sensor. DETAILED DESCRIPTION

[0043] The embodiment of the invention discloses a conveyor belt thickness detection device, which improves the accuracy of belt thickness measurement.

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0046] Belt conveyors are important transportation equipment for transporting materials in many fields such as ports, metallurgy, mining, chemicals, petroleum, power plants, building materials, etc. In particular, long-distance, high-power, large-volume, and high-speed conveyors have become the development trend of belt conveyors.

[0047] Combination Figure 1 As shown, during the material transportation process, the conveyor belt 2 is tensioned and driven by two pulleys 1. In order to prevent the conveyor belt 2 from sinking under the gravity of the material, a support wheel 3 for supporting the conveyor belt 2 is provided at a position opposite to the silo 4. When the pulley 1 rotates, the conveyor belt 2 rotates accordingly and completes the transportation of the material.

[0048] As the material is transported on the conveyor belt 2, it will slide relative to the conveyor belt 2, causing the conveyor belt 2 to wear. During the operation of the equipment, the conveyor belt 2 runs for a long time in a complex environment with high load, which makes the belt wear more serious. As the degree of wear deepens, when the thickness of the conveyor belt 2 is reduced to a certain value, it will affect the safe operation of the conveyor belt 2. For example, in underground transportation of coal mines, metallurgical materials, and materials in the chemical industry, a whole-core flame-retardant conveyor belt is usually used. When the outer flame-retardant layer of the whole-core flame-retardant conveyor belt is worn off, once the temperature of the transported material is abnormal, it is easy to cause a fire safety accident.

[0049] At present, there are two types of flame-retardant belts: PVC flame-retardant belts and PVG flame-retardant belts, and the flame-retardant layers of these two types of flame-retardant belts are not thick. Among them, the PVC flame-retardant belt is covered with a layer of PVC cover rubber on the upper and lower surfaces of the belt, and the thickness of the PVC cover rubber is ≥0.8mm. The covering layer on the upper and lower surfaces of the PVG flame-retardant belt is a combination of nitrile rubber and PVC, with a single layer thickness of 1.5mm-4.5mm, and the conveyor belt has a certain angle, which makes the center of the PVG flame-retardant belt more severely worn than the edge area.

[0050] In summary, in order to reduce the occurrence of failures, it is necessary to formulate a replacement cycle for the conveyor belt 2 based on production experience, and to manually perform thickness inspections regularly using a steel ruler or caliper.

[0051] However, the manual measurement method of the thickness of the conveyor belt 2 may cause inaccurate measurement results due to the influence of the measurement position. For the conveyor belt 2 having a flame retardant layer on both the upper and lower surfaces, the thickness change of the flame retardant layer on one side cannot be obtained, which affects the accuracy of the measurement results of the conveyor belt 2.

[0052] Continue to see Figure 1 As shown, in the above scenario, the present application discloses a conveyor belt thickness detection device, including: a first distance measuring sensor 7, a second distance measuring sensor 8, a synchronous trigger device 6 and a data processing device 5.

[0053] Combination Figure 2 As shown, the first distance measuring sensor 7 is opposite to the outer surface 21 of the conveyor belt 2, and is used to measure the distance h1 from the first distance measuring sensor 7 to the outer surface 21 of the conveyor belt 2. In some embodiments, the first distance measuring sensor 7 is fixed in position to ensure the accuracy of the measured value.

[0054] The second distance measuring sensor 8 is opposite to the inner surface 22 of the conveyor belt 2, and is used to measure the distance h2 from the second distance measuring sensor 8 to the inner surface 22 of the conveyor belt 2. In some embodiments, the second distance measuring sensor 8 is fixed, and the first distance measuring sensor 7 and the second distance measuring sensor 8 are arranged on both sides of the conveyor belt 2.

[0055] Since the positions of the first distance measuring sensor 7 and the second distance measuring sensor 8 are fixed, the distance between them is fixed. Herein, the distance between the first distance measuring sensor 7 and the second distance measuring sensor 8 is denoted as H.

[0056] The thickness value p_h of the conveyor belt 2 is calculated using the conveyor belt thickness calculation formula p_h=H-h1-h2.

[0057] In order to ensure that the distance detected by the first ranging sensor 7 and the second ranging sensor 8 is the inner surface and the outer surface at the same position on the belt to improve the detection accuracy, in some embodiments, the data processing device 5 is connected to the first ranging sensor 7 and the second ranging sensor 8 through a synchronous trigger device 6.

[0058] The synchronous trigger device 6 in this article is used for the data processing device 5 to synchronously collect the distances detected by the first ranging sensor 7 and the second ranging sensor 8 respectively, and according to the distance H between the first ranging sensor 7 and the second ranging sensor 8, combined with the conveyor belt thickness calculation formula p_h=H-h1-h2, the thickness value p_h of the conveyor belt 2 is calculated and stored.

[0059] In the present application, a first distance measuring sensor 7 and a second distance measuring sensor 8 are provided to realize automatic detection of the distance of the conveyor belt 2, and the thickness of the conveyor belt 2 is calculated by a data processing device under the action of a synchronous trigger device 6, without requiring manual operation, which is conducive to improving the accuracy of the result.

[0060] In order to ensure the accuracy of detection, it is necessary to obtain the distance from the inner surface to the outer surface of the detection position of the conveyor belt 2, that is, the inner surface and the outer surface are the inner surface and the outer surface of any sampling point of the conveyor belt 2, so as to avoid the inner surface and the outer surface of different sampling positions to affect the detection result. Therefore, in some embodiments, the connecting line of the first ranging sensor 7 and the second ranging sensor 8 is parallel to the thickness direction of the conveyor belt 2, so that the first ranging sensor 7 and the second ranging sensor 8 are arranged on both sides of the conveyor belt 2 opposite to each other.

[0061] In some embodiments, the first ranging sensor 7 and the second ranging sensor 8 are arranged symmetrically about the conveyor belt 2, which not only makes the measurement points of the first ranging sensor 7 and the second ranging sensor 8 the same position point on the conveyor belt 2, but also eliminates the error in thickness detection caused by vibration during the operation of the conveyor belt 2.

[0062] The above arrangement can ensure that during the conveying process of the conveyor belt 2, the first distance measuring sensor 7 and the second distance measuring sensor 8 can simultaneously detect the inner surface and the outer surface of the sampling point, and then calculate the thickness of the sampling point.

[0063] In order to improve the accuracy of detection, data from multiple positions on the conveyor belt 2 can be collected, and the calculated value of the conveyor belt thickness can be obtained by calculating the average value or fitting, which is used as the conveyor belt thickness value, thereby improving the accuracy of detection of the conveyor belt 2 thickness.

[0064] The data processing device 5 uniformly collects data values ​​of multiple groups of first distance measuring sensors 7 and second distance measuring sensors 8 along the length direction of the conveyor belt 2, and obtains the distances from the multiple first distance measuring sensors 7 to the outer surface of the conveyor belt 2:

[0065] At the same time, the data processing device 5 also obtains the distances from the same number of second distance measuring sensors 8 to the outer surface of the conveyor belt 2:

[0066] According to the conveyor belt thickness calculation formula, the thickness value of a set of conveyor belt 2 is calculated:

[0067]

[0068] The calculated thickness of the conveyor belt 2 is used for fitting to obtain the calculated value of the conveyor belt thickness P_H final , calculated value of conveyor belt thickness P_H finalThen it is the conveyor belt thickness value p_h.

[0069] Since the conveyor belt 2 is produced to transport materials all year round, problems such as materials sticking to the surface of the conveyor belt 2 or small scratches on the local area of ​​the surface of the conveyor belt 2 may occasionally occur. Therefore, in order to ensure the accuracy of the fitting calculation of the thickness of the conveyor belt 2, the number of samples is first increased, and then the interference of abnormal points is reduced through fitting.

[0070] (1) Sampling requirements:

[0071] The sampling points are distributed as evenly as possible along the length of the conveyor belt 2. For example, if the length of the conveyor belt 2 is L and the running speed of the conveyor belt 2 is v, the time it takes for the conveyor belt 2 to run one circle is:

[0072] T=L / v

[0073] When the sampling time interval is set to t, the number of sampling points is n=T / t. The sampling time interval t is controlled to ensure a reasonable number of samples.

[0074] That is, the data processing device 5 is integrated with a time relay, through which the data processing device 5 can collect a set of data values ​​of the first distance measuring sensor 7 and the second distance measuring sensor 8 at each preset time interval t, and store the measured data. When storing, the data of each sampling point includes the data measured by the first distance measuring sensor 7 and the data measured by the second distance measuring sensor 8 at this sampling point. This set of data is stored, and the thickness value of the conveyor belt 2 corresponding to this sampling point is calculated and stored. After storing the thickness values ​​of the conveyor belt 2 calculated at multiple sampling points, a set of thickness values ​​of the conveyor belt 2 is obtained:

[0075]

[0076] (2) Thickness value fitting:

[0077] Combination Figure 3 As shown, fitting is performed based on a set of calculated thickness values ​​of the conveyor belt 2. Due to interference from other factors, the obtained thickness values ​​of the conveyor belt 2 will be distributed around a fixed value.

[0078] like Figure 3 As shown in the figure, a set of calculated thickness values ​​of the conveyor belt 2 are displayed in a time series, where the horizontal axis is the sampling time and the vertical axis is the calculated thickness value of the conveyor belt 2. In the figure, from time ti to time ti+n1, the thickness measured in this area increases, which means that the conveyor belt 2 surface in this area is adhered with materials; from time tj to time tj+n2, the thickness measured in this area decreases, which means that there are scratches on the surface of the conveyor belt 2 in this area, but the overall conveyor belt 2 thickness sampling value will be stable around 20mm, and it can be determined that 20mm is the thickness of the conveyor belt 2 within this value.

[0079] During the actual transportation process, since the conveyor belt 2 normally carries materials, the degree of wear in the central area is more serious than that in the edge area. Therefore, in order to improve the accuracy of monitoring the conveyor belt 2 and improve the safety of the conveyor belt 2, in this solution, the first ranging sensor 7 and the second ranging sensor 8 can both detect the center position of the conveyor belt 2 in the width direction. In this way, during the rotation of the conveyor belt 2, the data collected by the first ranging sensor 7 and the second ranging sensor 8 are the data of the center position of the conveyor belt 2.

[0080] In some embodiments, a linear regression method is used to fit a set of thickness values ​​of the conveyor belt 2 to obtain a straight line equation y=ax+b, the thickness of the conveyor belt 2 is calculated based on the fitted straight line, and the influence of abnormal points on the overall thickness analysis of the conveyor belt 2 is eliminated.

[0081] If a=0, then P_H final =b,

[0082] If a≠0, then P_H final =(ax max +ax min +2b) / 2;

[0083] Among them, a and b are constants, x max is the largest value among the multiple sets of calculated thickness values ​​of conveyor belt 2, x max It is the smallest value among the multiple sets of calculated thickness values ​​of the conveyor belt 2 collected.

[0084] The data processing device 5 obtains the final thickness value of the conveyor belt 2 according to the above calculation method, and compares the thickness value of the conveyor belt 2 with a preset value. If the thickness value p_h of the conveyor belt 2 is less than the preset value, the alarm device issues a safety alarm.

[0085] It should be noted that the alarm device can be a buzzer alarm, a light alarm or a combination of sound and light alarm. The specific structure of the alarm device is not limited here.

[0086] In some embodiments, the data processing device 5 stores preset values, and the data processing device 5 is integrated with a control module, and the control module controls the alarm device to send out a safety alarm.

[0087] Since the conveyor belt 2 may vibrate up and down during transportation, or the conveyor belt 2 is not tensioned, causing the conveyor belt 2 to sink, based on this, the data processing device 5 in the present application also pre-stores a second agreed value from the second ranging sensor 8 to the inner surface of the conveyor belt 2, and when the distance h2 from the second ranging sensor 8 to the inner surface of the conveyor belt 2 measured by the second ranging sensor 8 is greater than the second agreed value, the alarm device issues an alarm that the conveyor belt is not tensioned.

[0088] It should be noted that the conveyor belt untensioned alarm issued by the alarm device in this article is different from the safety alarm issued by the alarm device, for example, it can be a light tube of different color, a different sound, or one is a sound and the other is a light.

[0089] During the detection process, the distance between the second distance measuring sensor 8 and the conveyor belt 2 is synchronously compared to determine whether the conveyor belt 2 is in a normal working position.

[0090] Based on the above technical solution, the data processing device 5 also pre-stores a first agreed value from the first ranging sensor 7 to the outer surface of the conveyor belt 2, and when the distance h1 from the first ranging sensor 7 to the outer surface of the conveyor belt 2 measured by the first ranging sensor 7 is greater than the first agreed value, the alarm device issues a safety alarm.

[0091] Since the material is in direct contact with the outer surface of the conveyor belt 2, the wear of the upper surface of the conveyor belt 2 will be more serious. By presetting the distance between the outer surface of the conveyor belt 2 and the first distance measuring sensor 7, the judgment conditions can be increased to improve the accuracy of the detection.

[0092] It should be noted that the priority of determining the distance between the first distance measuring sensor 7 and the outer surface of the conveyor belt 2 and the first agreed value is higher than that of determining the thickness of the conveyor belt 2 .

[0093] The alarm device in this article can be integrated in the data processing device 5. The connection mode of the data processing device 5, the synchronous trigger device 6, the first distance measuring sensor 7 and the second distance measuring sensor 8 can adopt signal connection or wire harness connection.

[0094] As shown in the present invention and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0095] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0096] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A conveyor belt thickness detection device, characterized in that: include: a first distance measuring sensor, the first distance measuring sensor being opposite to the outer surface of the conveyor belt and being used to measure a distance h1 from the first distance measuring sensor to the outer surface of the conveyor belt; a second distance measuring sensor, the second distance measuring sensor being opposite to the inner surface of the conveyor belt and being used to measure a distance h2 from the second distance measuring sensor to the inner surface of the conveyor belt, the first distance measuring sensor and the second distance measuring sensor being arranged on both sides of the conveyor belt; A data processing device, wherein the data processing device is connected to the first ranging sensor and the second ranging sensor via a synchronous trigger device, wherein the synchronous trigger device is used for the data processing device to synchronously collect the distances detected by the first ranging sensor and the second ranging sensor respectively, and calculate the thickness value p_h of the conveyor belt according to the distance H between the first ranging sensor and the second ranging sensor in combination with a conveyor belt thickness calculation formula p_h=H-h1-h2, and store the calculated value.

2. The conveyor belt thickness detection device according to claim 1, characterized in that: A connecting line between the first distance measuring sensor and the second distance measuring sensor is parallel to a thickness direction of the conveyor belt.

3. The conveyor belt thickness detection device according to claim 1, characterized in that: The data processing device uniformly collects data values ​​of multiple groups of the first distance measuring sensors and the second distance measuring sensors along the length direction of the conveyor belt, and obtains the distances from the multiple first distance measuring sensors to the outer surface of the conveyor belt. and the distance from the second distance measuring sensors of the same number to the outer surface of the conveyor belt: According to the conveyor belt thickness calculation formula, a set of conveyor belt thickness values ​​are calculated: The calculated thickness of the conveyor belt is used for fitting to obtain the calculated value of the conveyor belt thickness P_H final , the calculated value of the conveyor belt thickness P_H final Then it is the conveyor belt thickness value p_h.

4. The conveyor belt thickness detection device according to claim 3, characterized in that: The data processing device is integrated with a time relay, and the data processing device collects a set of data values ​​of the first distance measuring sensor and the second distance measuring sensor at every preset time t, and stores them; The preset time t satisfies: n=T / t, wherein n is the number of sampling points and T is the time for the conveyor belt to run one cycle.

5. The conveyor belt thickness detection device according to claim 3, characterized in that: The calculated thickness value of the conveyor belt is used for fitting to obtain the calculated value P_H of the conveyor belt thickness. final ,include: The calculated thickness of the conveyor belt is fitted by linear regression to obtain the linear equation y=ax+b. If a=0, then P_H final =b, If a≠0, then P_H final =(ax max +ax min +2b) / 2, Among them, a and b are constants, x max is the largest value among the multiple sets of calculated conveyor belt thickness values, x max It is the smallest value among the multiple sets of calculated conveyor belt thickness values ​​collected.

6. The conveyor belt thickness detection device according to claim 3, characterized in that: The first distance measuring sensor and the second distance measuring sensor both correspond to the center position of the conveyor belt in the width direction.

7. The conveyor belt thickness detection device according to any one of claims 1 to 6, characterized in that: It also includes an alarm device, and if the thickness value p_h of the conveyor belt is less than a preset value, the alarm device sends out a safety alarm.

8. The conveyor belt thickness detection device according to claim 7, characterized in that: The data processing device pre-stores the preset value, and the data processing device is integrated with a control module, and the control module controls the alarm device to send out a safety alarm.

9. The conveyor belt thickness detection device according to claim 8, characterized in that: The data processing device also pre-stores a first agreed value from the first distance measuring sensor to the outer surface of the conveyor belt. When the distance h1 from the first distance measuring sensor to the outer surface of the conveyor belt measured by the first distance measuring sensor is greater than the first agreed value, the alarm device issues a safety alarm.

10. The device for detecting the thickness of a conveyor belt according to claim 8, characterized in that: The data processing device also pre-stores a second agreed value from the second distance measuring sensor to the inner surface of the conveyor belt. When the distance h2 from the second distance measuring sensor to the inner surface of the conveyor belt measured by the second distance measuring sensor is less than the second agreed value, the alarm device issues an alarm indicating that the conveyor belt is not tensioned.

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